Hand-brake for railway-cars



HAND'BRAKE FOR RAILWAY CARS.

APPLICATION FILED sEPT.25, I9I9. RENEWED DEC. I8. I92o.

1,366,676. Patented Jan.v25, 1921.

2 SHEETS-SHEET l.

I" III J. F. OCONNOR. HAND BRAKE FOR RAILWAY QARS. APPLICATION FILEDsEPLz, I9I9. REIIEwE DEC. I8. I92o.

Patented Jan. 25, 1921.

- 2 SHEETS-SHEET 2.

PATNT oFricE.

UNITED STATES .roiiN pcoivivon,

OF CHICAGO, ILLINOXSQASSIGNOR TO WILLIAM H. MINER, CRAZY, NEW YORK.

`HANDIBRAKE FOB; RAILWAY-CARS.

Application led September 25, 1919, Serial No. 326,125. .RenewedDecember 18, 192D. Serial No. 431,786.

To all whom t 'may concern.'

Be it known that l, JOHN F. QCQNNOR, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented a certain new and useful Improvement in l-land-Bralres forRailway-Cars, of which the following is a full, clear, concise, andenact description, referw ence being had to the accompanying drawings,forming a part ot this specification.

Thisinvention relates to improvements in hand brakes for railway cars:

The object of the invention is to provide a hand brake suitable forrailway freight cars and wherein is obtained a high leverage ratio, theparts being compactly arranged and easily operable in the usual manner.H .f

' In the drawings forming a part otthis specification, Figure 1 is a topplan view of a hand brakeoi the vertical staff type showing myimprovements in connection therewith, a portion ot a car end wallbeinniindicated to bringout the position ot the brake with respectthereto. Fig. 2 is a-vertical sectional View upon an enlarged scaletaken on the line 2 2 of Fig. 1, parts being broken .away in order toprevent crowding of the.

drawing'. Figs. .3 and 4'are horizontal sectional views taken on thelines 3-3 and 4--4 respectively, of Fig. 2. And Fig'. 5 is a de- 'tailelevational view to illustrate the locking doe` employed with myimprovements.

Fig. 6 is a view similarfto Fig. 1 andillustrates another embodiment ofthe invention. Fig. 7 is a vertical sectional view taken substantiallyon the iine 7-7 of Fig. 6; And Fig. 8 is a horizontal sectional Viewtalrenon the line 8-8 of Fig. 7.

Referring `first to the construction illustrated in Figs. 1 to 5,inclusive. l0 denotes the end wallof a y ondola or other freight car and1-1 a vertical brake staff such as is Y ordinarily. used on 'freightcars. @n the upper end of the stati 11 is rotatably mounted a hand wheel12 of usual diameterfand rim so that the bralreman is enabledto operateit in the usual manner. Said hand wheel 12 is provided with a hub 13which is loosely rotatably mounted on the rounded V section 14 ot' thestaff. the hand wheel being prevented from accidental removal by anysuitable means-such as the washer 15 and nut 16. V

The hub 1.3 is iiituin rotatably mounted the rounded section 14 of thestali 11 piovided inthe hub 18 is, however, eccentric, as appears fromFig. 3, the function for this Aconstruction being explained hereinafter.

The hub 13 is provided with a radial lug 21 which worksin` an arcuateslot 22 provided in the sleeve 17 so that the hub 13 is permitted alimited amount of rotation with respect to the sleeve 17 and suiiicientto bring the bearing Jfor the staff 11 concentric with they axis of thevsleeve 17. ,y

:Below the hub 18, the stail 11 is provided with a squared section'indicated at 23, on which is ynon-rotatably mounted a pinion 24. Theteeth oi" the pinion 24 mesh with `an internal iiXed gear 25 oi largerdiameter, the gear 25 being concentric with the sleeve 17,

so that, when the hub 13*and the bearingY for the upper end of the steli11 are rotated so teeth 27' is a gravity. controlled dog 28 piv,

otally mounted ona stud 29 cast integral with the .upstanding flange 19of `the bracket 20. i 1

The operation isas follows; Assuming the parts as shown by the lulllines-in Figs.

1, 2` 3 and 4, to windup the brake chain, the

brakemanturns'the'hand wheel 12 inthe direction indicated by the arrow ain Fig. 1. In this condition, it will beA noted' that the lug 21 of thehub 18 isbearing againstthe corresponding shoulder 121 of the sleeve 17,and, consequently, the sleeve 17 will be moved in unison with therotation of the hand wheel 12. This. causes the pinion 24 to roll alongthe internal gear 25 and reas to bring the'axis of theY staff 11 intoooincidence with vthe axis or centeroi the in-l main enmeshedtherewith., Due to thedifference in number of teeth on the pinion 24 andinternal gear ,25, itisev'ident that rela-` Y 50 dicatedat 407 tiverotation between said pinion and internal gear will take place, theamount of rela- Vinfnumberof teeth. In the drawing I have 5 shownapproximately Jforty teeth in the Vin-V ternal gear and approximatelythirty on the pinion 24, sothat, for a complete revolution Vv"ot' thehand Awheel 12, the staff 11 will be roftated in the reversedirectionthat is cunter-clockwisc-approximately onethird of` arevolution 1With this differential planetary gearing', it is evidentthat the leverage ratio is appreciably multiplied and may be made asgreat as desired, consistent vl with'` theV necessary speed in windingup the brake chain. The gravity dog 28 will automatically coperate withqthe'teeth`27 of the ratchet wheel and prevent any possible accidentalrelease of theparts. To effect revlease of theY Abrake chain, thebrakeman merely turns the hand wheel 12 n the reverse direction--thatis, counter-clockwise which will permit the .'hub 13 to rotate Vwithrespect to the sleeve 17 a distance corresponding to the length of thearcuate slot'22. @As this-relative' rotation between the hub V13 andsleeve l'oc'curs', the pinion '24C isY dis engaged from the internalgear 25,` thereby leaving the staff ll'free to rotate under the thechain,the brakeman :rotates thevvheel 12 inthe usual manner and ltherewill be a short period of lost motion'while the lug 21 is traveling inthe arcuate slot 22,*after which operation is as above described.

In the construction illustrated inFigsB,

7 and 8, thearrangement is much the saine except Vthat no provision 'ismade for disen- Agaging the pinion Afrom the internal gear, and torelease the brakechain, the brakeman is requiredto rotate the hand wheelin a `direction the reverse of that employed in the winding o eration. a,Y

In said igs. 6, 7 and 8, the hand wheelis designated as 112 and has adepending flange 113 serving as'ahub, said flange 113 being `looselyVrotatably seated vonan upstanding flange 119"formed integral with thebracket '120. The hand wheel 112 hasa bearing, in-

centric Vwith respect to the hub ange 113.

Below 'the circular section 114, thejstaff is *provided* with a squaredsection 123 'on "which is non-rotatably mounted a pinion124,"saidfpinion meshing with an internal stationary 631" 125 formed onthe inner-side of'said'flange 119. The hub flange 113 isprovided alongits V60' undersurace with a 'series of radially-ar `ranged `teeth 127,withwhich coperaties a gravity controlled jpivoted dog 128'having`Y`-arelease'handle-41.

'Thejop'eration isas follows: To lwindup Vated member for the uppercircular sectionA A114: of the Stal? 111, whichl bearing 410 is ec n`and a hand wheehcf a tated in the direction indicated by the arrowb-that'is, clockwise. This causes the Vtive rotation 'depending uponthe'dnfferencel eccentrically vmounted stai to travel-with its a' pinion1241 around the internal gear `125,

thereby causing relative rotation between 7oV `the gear 125 ,and thepinion 124.l The vamount Vof relative rotation, of course, depends uponthe dii'erence Vin the number of teeth between the pinion and fthe gear,which may be made as small or as great .as desired to obtain -thenecessary leverage. ratio. As a precautionary measure, the dog 128 isemployed to retain the wheel against accidental reverse rotation. Tolrelease the brake chain, the operator disengages the locking dog 128and rotates the hand wheel in a counter-clockwise direction until 4thenecessary slack in the chain'V has been obtained. Y i

I claim: l f v K 1. Ina brake of the character described, thecombinationwith a verticalv staff' having a pinion rotatable in unisontherewith, of a liXed internal gear surrounding and coperable with saidpinion, and means toreo 'ftween'the pinion and gear and thus rotate Y'ithestaff.,v tension on the brake chain. To Vagain wind bracketarranged to be attached to the wall ofy a car, of an internal gear xedwith respect to said bracket, a pinion rotatable in unison with thestaff and a manually operrotatably mounted on the bracket and rotatableabout the same axis as that of said gear, said member having aneccentric bearingfor the stai.` y

- V3. In a'brake 'of the character described, the combinationlwith avertical brakestai, o1 a hand wheel having a hub provided with an`eccentric bearing for the'upper end 'of said staff, a stationaryAinternal gear with its axis coinciding with the axis'of rotation of the'hand wheel, and a pinion of aV lesser 'number of teeth than `said gearand xedon Vthesta andcoperable withjsad internal gear. l Y a f 4. In adevice of the characterdescribed, the combination with aVV verticalVbrake staff Y system of planetary gears'inter'posed between 'said handwheel and the staff including, onegear fixed to the staff, andrmeans foreffecting the release of said gears to render them inoperative vandthereby release the staff. i V

f5. In a brake of the character described, the combination with a 'brakestaff, Vand a bracket arranged to be attached to the wall of a car,of'an internal gear xed withre- `spect to 'saidbrackeu apinion rotatablein I unison with the stair' and'a manually voperated member rotatablymounted on the "bracket and rotatable about the same'axis asf130 p thatof said gear, said member having an eccentric bearing for the staff, andmeans cooperable With said member and the bracket for shifting thebearing of the sta to a position concentric With the gear to therebyrelease the stai.

6. In a brake of the character described, the combination with a fixedbracket and a vertical brake staii, of a hand Wheel loosely rotatablymounted on the top of the staii', said hand Wheel providing an eccentricbearing for the upper end of the staff, a pinion mounted on said sta-ifto rotate in unison therewith, and a fixed internal gear with Which saidpinion coperates, said hand Wheel being rotatable about an axiscoinciding With the axis of the internal gear.

7 In a hand brake for railway cars, the combination with a bracketsecured to a car Wall and having a fixed internal gear, of a verticalbrake staff having a pinion near the upper( end thereof rotatable inunison with the staii, said pinion normally meshing With said internalgear, a hand Wheel having a hub, said hand Wheel and hub being rotatableabout an axis coinciding with the axis of said internal gear, said hubhaving an eccentric bearing for the staff and a Y member looselyrotatably mounted on said bracket about an axis coinciding with the axisof the internal gear, said hub and member having a predetermined amountof lost motion therebetween to thereby permit shift ing of the eccentricbearing of the staii.

In Witness that I claim the Aioregoing I have hereunto subscribed myname this 8th day of Sept., 1919.

JOHN F. CONNOR.

